Per elieson



No. 621,048. Patented Mar. l4, I899.

C. P. ELIESUN.

ELECTRIC STORAGE CELL.

, (Application filed may 9, 1898.)

(No Model.)

Wdnesses Q Inventor. fi2@.%fl

THE "cums PETERS c0. PHoTuuTHo wAsHmGYON. o. c.

UNITED STATES FFICEE.

PATENT ELECTRIC STORAGE-CELL.

SPECIFIGA-IIQN forming part of Letters Patent No. 621,048, dated March14, 1899. A nman filed May 9, lees. Serial. No. 680,135. on model.)

To all whom it may concern.-v

Be it known that I, CHAIMSONOVITZ PROS- PER ELIESON, a subject of theQueen of Great Britain,residing at London, England, have invented newand useful Improvementsin Elec trio Storage-Oells,(for which I haveapplied for a atent in Great Britain, N 0. 23,489, dated October 12,1897,) of which the following is a specification.

My improvements relate to electric storagecells or accumulators of thetype known as Plant accumulators,'and have for their obj ects to improvethe mechanical construction of the lead plates and of their attachments,thereby giving them greater strength and durability than heretofore, andto subject the.

interiors of the plates more uniformly than hitherto to theelectrochemical process known as formation.

According to my invention an accumulator-plate is built up of severallayers of perforated and corrugated sheet-lead, the said layers being soplaced relatively with one another that the corrugations of one layercross or are at an angle to those of adjacent layers, the several layersbeing secured together by lead rivets. To the top and bottom of theseveral layers so united are autogenously soldered channel-pieces oflead. To protect the outer surfaces of the plates in order that theinteriors'thereof may be uniformly subjected to theelectrochemical'action, I apply during the process of formation anexterior coating of protecting varnish.

To enable my invention to be fully understood, I will describe the sameby reference to the accompanying drawings, in which-- Figure 1 is asectional elevation of a lead plate with its attachments constructedaccording to my invention; and Fig. 2 is a sectional plan View of theplate without the attachments, drawn to a larger scale than Fig. 1.

.1 say, vertical corrugations is adjacent to an- Figs. 3, 4, and 5 areend views of the attachments hereinafter described.

In carrying out my'invention a series of I pieces a a a, of thinsheet-lead of the required size and perforated with holes, as indicatedon parts of the outer plate at a a in Fig. 1, and corrugated, (bypassing through rollers or in other known manner,) are laid upon oragainst one another so that each piece with,

other piece or pieces with, say, horizontal corrugations, and then anouter sheet I), also perforated and corrugated, is preferably Wrappedaround the assembled pieces to hold them together. This outer wrappingor sheet has its edge folded or rolled in, as shown at c, and secured ortacked at several spots 0 by autogenous soldering, commonly known aslead-burning, which may be effected in the usual way by the flame of ahydrogen-blowpipe or preferably by the use of a Well-heated copper bitresemblinga soldering-iron. The assembled sheets ct a thus secured intheir outer Wrapping of corrugated and perforated lead I) are thenfurther secured by lead rivets cl d, passed through them at suitabledistances. apart. Theserivetsare'at one end provided with beads, andover the projecting stems of the rivets at the other ends are slippedleaden washers, which are melted by autogenous soldering to the stemsand to the adjacent parts of the assembled sheets. The top and bottomedges of the plate are then firmly secured together by applying to themleaden pieces or channel-pieces e f, preferably of channel form, asshown, the said channel= pieces being preferably united with the plateat several points, as at e f, by autogenous soldering.

In order to obtain a good electrical connection between the severalsheets or layers of a plate and the channel-pieces, the latter arepreferably provided with pairs of sweating lugs g g, which project overthe plate at the top and bottom, and these lugs are united with theseveral layers in the following mannerthat is to say, a hydrogen flameor a hot bit is brought into contact with each lug, so as to melt a holethrough it and into the plate, and While in this melted condition leadis burned in until the cavity is filled up. After the lugs on one sideof the plate have been burn ed, as described, the plate is turned overand the operation is repeated upon the lugs on the other side. g inFig.1 indicates the burned-in portions,which perfectly unite thearmatures or conductors with the several layers. In order,further, toinsure the uniform distribution of the electric current over the plate,and the consequent uniform charging and discharging at all points, Iadvanta geously burn the lateral edges of the several I sheets or layersof aplate together. In some cases also I burn the sheets together at thetop and bottom edges before the channelpieces are applied.

The channel-piece e is provided with a pro jection or lug, such as h,for making connections between the several plates in a battery. Thechannel-piecesfiwhich I prefer to provide for the lower edges of thoseplates which are k to act as positives in my cells, are fiat underneath,as shown in Fig. 5, While the channelpieces for the lower edges of thoseplates 1 which are to act as negatives are preferably provided withprojections or feet t' t, on which varnishing is to insure that the saidprocess of formation shall take place first in the interior of theplate,where surfaces are exposed at its interstices,before the outsideis attacked. After the process of formation has been completed thevarnish or so much of it as has not disintegrated is removed by brushingor otherwlse.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. A plate for an electric accumulator comprising aseries of parallel perforated and corrugated plates, the corrugations ofone plate being arranged at an angle to those of the adjacent plates,the exterior plates being formed of i one piece bent to surround theinterior plates and having its ends secured together and rivets of thesame material as said plates uniting the same, the several plates beingunited by autogenous soldering, substantially as described.

2. A plate for an electric accumulator comprising a series of parallelperforated and corrugated plates, the corrugations of one plate beingdisposed angularly to those of the next adjacent plates, the exteriorplates being formed in one piece bent around the interior plat-es andhaving its ends secured together,

channel-pieces embracing the upper and lower edges of the compositeplate and provided with sweating-lugs, autogenously connected to all ofsaid plates, substantially as described.

GHAIMSONOVITZ PROSPER ELIESON. \Vitnesses:

G. F. REDFERN, JOHN E. BOUSFIELD.

